It is always good to have some technology resources. The best way to learn a new technology is to look the overall architecture first, like the end to end communication interfaces, protocols involved, radio interface technology involved, etc. After knowing the overall system architecture one can start going into details of system nodes. LTE is the latest technology to look (more ..)
System Information is divided into MasterInformationBlock and a number of SystemInformationBlocks. UE needs to locate and read the system information before establishing any connection to the E-UTRA. SystemInformationBlockType1 and all SI messages are transmitted on DL-SCH. UE shall apply the system information acquisition procedure: upon selecting and upon reselecting, after handover completion, after entering E-EUTRA from other RAT, upon return (more ..)
The BITMAP SUFI consists of the following fields: Type identifier field(BITMAP) LENGTH Filed First Sequence Number(FSN) Bitmap The BITMAP SUFI fields in the STATUS PDU are as follows: Type = BITMAP LENGTH FSN Bitmap LENGTH The LENGTH is a 4 bits long field. The LENGTH field signifies the size of bitmap in octets. The size of bitmap in octets = (more ..)
There are two different types of MAC HSDPA PDU format depending upon the upper layer configuration. MAC-hs MAC-ehs In this tutorial only MAC-ehs is covered. In this case the MAC HSDPA PDU is consists of MAC-ehs header One or more reordering PDUs Each reordering PDU consists of one or more reordering SDU belonging to the same priority queue. Header Elements (more ..)
There are two different types of MAC HSDPA PDU format depending upon the upper layer configuration. MAC-hs MAC-ehs In this tutorial only MAC-hs is covered. MAC-hs In this case the MAC HSDPA PDU is consists of MAC-hs header One or more MAC-hs SDU NOTE: A maximum of one HSDPA PDU is transmitted in on TTI Header Elements VF (Version Flag): (more ..)
3GPP message decoder is a very simple but powerful tool to decode GSM, UMTS, LTE, IP messages. This is developed by protocolanalyze. 3GPP decoder is a simple application using Wireshark to decode messages. 3GPP Message Decoder has a very simple interface. The user interface has the following sections: Enter the HEX message to decode in the top text area. You (more ..)
In a UMTS system, the maximum supported downlink data rate is 2.048 Mbps. With other technologies such as HSPA, LTE, higher data rates are possible, but we look at data rates for UMTS only systems. Each application has a certain Quality of service (QOS) requirement. A user who wishes to run a application that demands high data rate informs the (more ..)